The diary contents, listing meetings with a series of journalists and former prime minister Malcolm Turnbull in March 2021, were referred to in The Australian on Saturday.
The newspaper also features an interview with former minister Linda Reynolds in which she claims she was the victim of a "very well-orchestrated political hit" to take her and the then coalition government down.
Ms Higgins accused fellow staffer Bruce Lehrmann of raping her inside the Parliament House office of Ms Reynolds, who they both worked for, in 2019.
Mr Lehrmann's criminal trial in the ACT Supreme Court was cut short in October because of juror misconduct.
Prosecutors later dropped the charges over concerns of the impact a second trial would have on Ms Higgins' mental health.
Mr Lehrmann denies the rape allegation, maintaining he and Ms Higgins never had any sexual interaction.
In a series of Twitter posts on Saturday, Ms Higgins said she gave police a photo of a page from her diary in 2021 for their investigation.
"I voluntarily provided this material to the police to help them form the brief of evidence and none of it was tabled in court," she said.
"Therefore, no journalist should have seen the photo of my diary."
Ms Higgins added that it was the third time private material from her phone had been published.
"Stop publishing the private contents of my phone. I entrusted police with my private information for the sole purpose that it could aid their investigation into my sexual assault, nothing else," she said.
Mr Lehrmann's trial heard suggestions Ms Reynolds was mainly concerned with the impact the rape claim could have on the upcoming federal election when she met with Ms Higgins after the alleged assault.
Ms Reynolds categorically denied the suggestion during the trial and she told The Australian the accusation was "like a stake through my heart".
"Brittany's story was perfect for the MeToo movement and for those of my colleagues in the Senate who were trying to bring down the government," she told the newspaper.
Mr Lehrmann is suing multiple media outlets over their coverage of the rape allegations, while the ACT government has launched an independent inquiry into the handling of Ms Higgins' complaint by police, prosecutors and a victims' support service.
Ms Higgins reached a confidential settlement with the Commonwealth last year, reported to be worth several million dollars, over her claims of sexual harassment and discrimination at parliament.
